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Effective-index method with built-in perturbation correction for integrated optical waveguides

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3 Author(s)
Kin Seng Chiang ; Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong ; Kai Ming Lo ; Kam Shing Kwok

It is well known that the conventional effective-index method for the analysis of rectangular-core waveguides can in general produce accurate results only when the modes of the waveguides are operated in the far-from-cutoff region. In this paper, an improved effective-index method, called the effective-index method with built-in perturbation correction, is described. This method is as efficient as the conventional method pet produces much more accurate results. Numerical examples for single waveguides and directional couplers are presented to demonstrate the accuracy of the method with results obtained from an improved Fourier decomposition method as the references

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Lightwave Technology, Journal of  (Volume:14 ,  Issue: 2 )